http://msdn.microsoft.com/en-us/library/ee264315(v=VS.85).aspx
Notification system has request to google for map data with secure http connection (https), somehow it responds as mixed content (Https + http) from google. In this case, IE7 & IE8 gives the security prompt to end user.
There is concern whether this issue still happens when we launch notification from US office with IE7/8. If this issue only impacts to China, it is possibly from the content firewall of China mainland. In case of we’re all impacted by this issue, the workaround is that inform our clients to change the IE(7&8) browser settings to allow mixed content w/o prompt in product release notes.
The issue should be critical because the promp will make the user feel unsecure when using the system.